Dutton and Mr, Bodfish. 
August 19th; Marched 22 miles toward Mount Trumbull, 
The rocks at the spring are triassic, but the plain across 
which we marched is underlaid by the permian. Details of geo- 
logical observations omitted* 
August 20th: Marched all day. Beached the saw mill 
tanks at the base of Mount Trumbull at night. Captain Dutton 
says that I am to work on the stratigraphy of the sedimentary 
and he on the volcanic formations. 
August 21st: Climbed Mount Trumbull and made sketch 
of canyon district to the east. 
August 22nd: Climbed Mount Trumbull again. 
